Review Of How Late Can You Book A Carnival Cruise Ideas. Web you could probably book a week before the cruise up a couple days out. Web when it comes to boarding a cruise ship with carnival, guests are typically allowed to embark on their voyage between the hours of 11:30 a.m.

I know that with homeland security they have a cut off date for booking but. Find great deals and specials on. Guests with early flights home need to register.